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arXiv 1202.0669cond-mat.mes-hall
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悬浮石墨烯谐振腔中量子霍尔态与机电耦合

Coupling between quantum Hall state and electromechanics in suspended graphene resonator

Vibhor Singh, Bushra Irfan, Ganesh Subramanian, Hari S. Solanki, Shamashis Sengupta, Sudipta Dubey, Anil Kumar, S. Ramakrishnan, Mandar M. Deshmukh

摘要:

利用石墨烯谐振器,我们在量子霍尔机制下进行机电测量,以探测量子霍尔(QH)系统与其机械运动之间的耦合。通过共振对QH态进行机械扰动,改变了系统的直流电阻,并由于电子干扰而导致Fano线形。系统的磁化修改谐振器的平衡位置和有效刚度,导致谐振频率的变化。我们的实验表明,量子霍尔态和力学之间存在着密切的耦合-电子输运受到物理运动的影响,反过来,磁化修改机电响应。

英文摘要:

Using graphene resonator, we perform electromechanical measurements in quantum Hall regime to probe the coupling between a quantum Hall (QH) system and its mechanical motion. Mechanically perturbing the QH state through resonance modifies the DC resistance of the system and results in a Fano-lineshape due to electronic interference. Magnetization of the system modifies the resonator's equilibrium position and effective stiffness leading to changes in resonant frequency. Our experiments show that there is an intimate coupling between the quantum Hall state and mechanics - electron transport is affected by physical motion and in turn the magnetization modifies the electromechanical response.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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